Year	Tonnes
1950	267691
1951	590387
1952	979089
1953	1397127
1954	1866503
1955	2328545
1956	2856593
1957	3454314
1958	4052035
1959	4657090
1960	5276813
1961	5859866
1962	6508925
1963	7634694
1964	8866806
1965	9908234
1966	11213686
1967	12372458
1968	13633906
1969	14825681
1970	16255811
1971	17766615
1972	19446101
1973	21415280
1974	23388126
1975	25496651
1976	27707852
1977	29996060
1978	32386944
1979	34777828
1980	36912022
1981	38745522
1982	40513016
1983	42416189
1984	44022335
1985	46009849
1986	48001030
1987	50450586
1988	52922144
1989	55511046
1990	58022941
1991	61194896
1992	64513531
1993	68308876
1994	72903627
1995	77931084
1996	82500166
1997	87974997
1998	93787192
1999	99485710
2000	105228232
2001	111176106
2002	117215655
2003	123768584
2004	130134496
2005	136588416
2006	143434705
2007	150413006
2008	156958601
2009	163401520
2010	169859107
2011	176507378
2012	183170317
2013	189400550
2014	195685788